$ git clone -n https://src.fedoraproject.org/rpms/rubygem-pdfkit.git /var/lib/mock/f39-build-1499281-34744/root/chroot_tmpdir/scmroot/rubygem-pdfkit
Cloning into '/var/lib/mock/f39-build-1499281-34744/root/chroot_tmpdir/scmroot/rubygem-pdfkit'...
$ git fetch origin e4f2e8378aefbea02c695c05b59ed724cf37fefe:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-pdfkit
 * [new ref]         e4f2e8378aefbea02c695c05b59ed724cf37fefe -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e4f2e83 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild